IO性能工具

一、iotop

1. 用法

/# iotop --help
Usage: iotop [-h] [-P] [-d <delay>] [-n <cycles>] [-s <column>]
   -a  Show byte count instead of rate
   -d  Set the delay between refreshes in seconds.
   -h  Display this help screen.
   -m  Set the number of processes or threads to show
   -n  Set the number of refreshes before exiting.
   -P  Show processes instead of the default threads.
   -s  Set the column to sort by: pid, read, write, total, io, swap, faults, sched, mem or delay.

2. 示例

iotop -d 5 //统计最近5秒的

iotop -m 4 //循环显示4个线程

iotop -m 4 -n 3 //只循环显示3次

iotop -P -m 4 //以进程为单位进行展示而不是线程

iotop -s faults -m 4 //按faults进行排序，可选的还有 pid, read, write, total, io, swap, faults, sched, mem or delay

/ # iotop | head -5
                          --- IO (KiB/s) --- --- faults ---  ----------- delayed on ---------- //单位KB/s
   PID Command            read  write  total  major  minor  IO     swap   sched  mem    total
  1165 logcat                0    212    212      0      0  0.00%  0.00%  0.00%  0.00%  0.00%
 26337 peechservice          0     44     44      0   3451  0.00%  0.00%  0.00%  0.00%  0.00%
  2808 queued-work-loo       0     12     12      0      3  0.00%  0.00%  0.00%  0.00%  0.00%

# iotop -a | head -5
                          ---- IO (KiB) ---- --- faults ---  ----------- delayed on ---------- //单位KB
   PID Command            read  write  total  major  minor  IO     swap   sched  mem    total
  1165 logcat                0    240    240      0      0  0.00%  0.00%  0.00%  0.00%  0.00%
  1167 logcat                0     36     36      0      0  0.00%  0.00%  0.00%  0.00%  0.00%
  2921 Thread-4              0     12     12      0      0  0.00%  0.00%  0.00%  0.00%  0.00%

3. 相关命令

# io
ionice                   iorap.cmd.maintenance    iorap.prefetcherd        iorenice
iorap.cmd.compiler       iorap.inode2filename     iorapd                   iotop